Unified model of k-inflation, dark matter, and dark energy

Journal Article · Sun Nov 15 00:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.103508· OSTI ID:21308603

Bose, Nilok; Majumdar, A S ^[1]

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1. S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Calcutta 700098 (India)

We present a k-essence model where a single scalar field is responsible for the early expansion of the Universe through the process of k inflation and at appropriate subsequent stages acts both as dark matter and dark energy. The Lagrangian contains a potential for the scalar field as well as a noncanonical kinetic term, and is of the form F(X)V({phi}) which has been widely used as a k-essence Lagrangian. After the period of inflation is over the model can be approximated as purely kinetic k essence, generating dark matter and dark energy at late times. We show how observational results are used to put constraints on the parameters of this model.

• OSTI ID: 21308603
• Journal Information: Physical Review. D, Particles Fields, Vol. 80, Issue 10; Other Information: DOI: 10.1103/PhysRevD.80.103508; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
EXPANSION
LAGRANGIAN FUNCTION
NONLUMINOUS MATTER
POTENTIALS
SCALAR FIELDS
UNIFIED MODEL
UNIVERSE